Automatic telephone station selector set for transmitting station numbers



Jan. 9, 1951 P. KAELIN 2,537,188

AUTOMATIC TELEPHONE STATION SELECTOR SET FOR TRANSMITTING STATIONNUMBERS Filed April 16, 1949 4 Sheets-Sheet 1 A H027? fy Jan. 9, 1951Filed April 16, 1949 P. KAELIN 2,537,188 AUTOMATIC TELEPHONE STATIONSELECTOR SET FOR TRANSMITTING STATION NUMBERS 4 Sheets-Sheet 2 Jan. 9,1951 P. KAELIN 2,537,138

AUTOMATIC TELEPHONE STATION SELECTOR SET FOR TRANSMITTING STATIONNUMBERS Filed April 16, 1949 4 Sheets-Sheet 3 lm/en 7w Pierre ZfQC /M P.KAELIN 2,537,188 AUTOMATIC TELEPHONE STATION SELEC SET FOR TRANSMITTINGSTATION NUMB .Ejan. 9, 1951 4 Sheets-Sheet 4 Filed April 16, 1949 lowingdescription and claims in conjunction Patented Jan. 9, 1951 2,537,188

U N l ED TAT ES N T OFF I C E 2,537,188 GM i fE EP NE 'iK N S 5E1 TOR ETFOR TRANSMITTING STATION NUMBERS- Pierre Kaeli mLausanne, SwitzerlandApplication zipril'fm, 1949, Serial Nb, 8735's -In Switzerland June 14,1948* I 22 olaimsi (01.17'9-90) Q 1 r2 Theprese'nt invention relates toa-telephone set tacts as there-are groups "of rel'ays PR -a nd whichwith a device for composing call-signs. This set operates While thesupscribemscom is characterized thereby that it includes-a device sign.The switch CRRI sci id's cute-e111; for recording at least one "callsign, automatic group of relays BR successively and is" actuated meansto throw repeatedly on 'the line impulses "5 by a recording relay -RR.Thus, -f0ra;'c'al1-ifi which correspond "to this-sign and -at leastoneconsisting "of one-number, each-digit-of' the i-liinfrmembermak'ing'p'ossime *the "stoppage ofthe au ber shall be reccniedinauifierent group tomatic means-"when the selection has been suclaysP-R, each group including as ma y-Felt, s cessful, all of-this in suchamanner as to produce as there a-re possible digita nam'ely 11). lhis azautomatically succes'sivecalls in case the line is iangement couldeasily be extended to'call-sighs busy until ?the "telephonecommunication is 'obconsisting of letters or even offig-uresand-ltteisitained.

The novel arrangement-according to the present invention and theobjects'and advantages of thisarrangemeht will "be-apparent from thefolwith the attached drawing showing by way of eX- ample an embodimentof the invention, low :the' :proce'ss of the composition ofa call-slgInthe drawings: W111 be described i'n det'ail'withi n the fi anie'of tFigures, 1 2 and 3 Show respectiveparbs 9f general operation of the set.It may be stated; diagram of an assembling of a telephone set achOWeVeI,that e at fit cording to the invention. and must, in order to he relayPRI will be connected. Thesub's'cr ibei read the whole diagram,beconsidered asplaced M6 5 y s 'C s d the o ct one above t t 1 t Fig, 2at the the switch ORR theh Jp'assesove-r the contact 11 centenand Figflat'bhe bottom; and and the relay PRIF is connected; The 13- Figure4-is a perspective view of a detail of a scriber presse 'dn the ey 5; cng the va t MANG, the switch CRR passes over the contact The recordingd'evice for the call-sign is shown I t us con c in e la I ;and-N6;1 36in Figure 2. 'It includes recording relays *desigisthen registered. I

nated by PR, distributed in 1-2gr0ups of lfl'relays The automatic -frepeatedly thiiowifig each; Only fourof these groups are partly reponthe-line impulses which correspond-110 mm resentedyire. the-firstandlastrelays P-Rl and Corded! Call are p mainly in 1 PR1) of the first-Lg-rupPRI nd of t groups These means include :a' numbering drum I'GH PRVI;PRVI=I and PRXII respectively. 'Ehereadriven by motor M9 (F ure 1 Thisdrum sons which determine-the numbers of thezgroups TCHCOHSI'SGS J' p dt -u bf shall be explainedfurther below. These relays Which is etllialt0 'tlTe illlIiIbEI l are t n ,by t t MAN, -10 group. These cams act toclose contact over a MAN-1 through 'o respectjvglay operated fractionofa tui 'h of different length foreachone manually by means of keysforminga keyboard, of'themywhich fraotion'of 'a'tur'n is a function-ofwhich constitutes the device for compgsing the 4,0 the figure itiSintended fdtIPLIiSl'Ilit. The motdi' call sign There shall be as manykeys as there furtherdrives-acam'tvheel deviceflMO 'i'nthd'd are MANcontacts, each keybeingconnected with to row p s p fi' e. The terminalsone of lthese contacts; The composing device of (Ifthis Cam WhEBldGViGG, *d'Sig'IIEtSd by 12 the call-sign couldalsoinclude an ordinarydisc, 3, r Connected W Corresponding minals operated r and .integnal tha cam wheeL l, '2 and c of-Figure '1. As thaterminal's"! and The keys ofthe keyboard which; for the'sake of a e normallyvshort-circuited, thimmuse -pro-- simplification, we shall designate by MAN, like duced ythe a W eel 6M0 remainwithmitthe contacts, are equipped. with controllamps tthe other during o g LMAN. In general, in this set, the operatingor shorter period of time during which one-of, members containingcontrol lamps are madeof the cams of the drum ECH operates, anumbertranslucent-material and'the'lamp'is located being relay RGH-isconnected which-acts to-openhind the operatingmember, whether it is akey, the short-circuit of the terminals i -and 2. -Dur"-' knob,push-button oranyth'ing else. ing this period of time, the impulsesare'thrown The groups of relays 'PR are ma'de dependent on the telephoneli-ne designated-by =ab (Figure on a'rotar'y switchcR'Rpwhich'has'as'many'con- 1). The arms DG and D6 'of" a distributor DGwith arms, DG DG DG DG and DF (Figures 2 and. 3) cause each group ofrelays PR to cooperate successively with the numbering drum. Thestepwise advance of the distributor DG is obtained by relay RDG whichitself is actuated by a rotary contact CTO driven by the motor.

The main members of the set having thus been briefly described, theoperation of same is as follows:

The making of an ordinary call includes two main operations: thecomposition of the number and the call proper.

For the composition of the number, the subscriber presses, for example,on the key MAN of the keyboard, thus connecting the correspondingcontact MAN Through the wire 54 the relay RR is connected, causing theswitch CRR, which was at rest at zero, to advance to position 1. Theenergizing of the relay RR also produces, through sending current intothe wire 4, the energizing of a transit relay RTR (Figure 1), which willbe held by the wire H. The energizing of the relay RTR causes the wires20 and 2| to be fed, likewise as the wire 22 leading to the rotarycontact CTO, and, furthermore, causes the connecting of a cancellationrelay RA, the subsequent releasing of which will produce, as will beshown later, the return of the switch CRR to zero. The energizing of therelay RTR finally produced the connecting of a lamp LMAA which thuslights up as soon as the first part of a call-sign is recorded. Theswitch CRR, having reached position I, the first group of relays PR isfed by wire 58 and the relay PR1 will be connected by the key MAN Theprocess is similar for any other figure constituting the callsign. Onceconnected, the respective relays PR are held by the current fed throughthe wires 20 and 2 1.

After the desired call-sign is composed, the subscriber presses a switchMTK (Figure 1) equipped with a control lamp LMTK, which then lights up.It thus connects a relay RTK, which, upon being energized, closes thecircuit of the line l0, and through wires 8 and 9 connects a loudspeakerprovided with an amplifier designated by AH in circuit with analternating current supply source S. Furthermore, it connects throughthe wires 9 and I9 the motor M0 (the relay RTR being still connected)and releases by interrupting the wire 6 the cancellation relay RA. Thisreleasing causes the return of the switch CRR. to zero. The motor MObegins to rotate at a speed of 10/12 revolutions per second. At eachturn of the motor, the rotary contact CTO actuates the relay RDG of thegeneral distributor DG, sending current to same through wire 55, whichcauses the general distributor DG to advance one position, the differentpositions of the said general distributor being the following: PositionZ: zero; next position Y (see DG the fork relay RF (Figure 1) is fedthrough the wire 48, which causes the opening of the line circuit;positions I to XII: (see DG and DG the current fed through wires 34 and33, respectively, energizes the numbering relay RCH through the closedcontacts of the relays PR involved and through the cams of the numberingdrum TCH. The current flowing to the cams of the drum TCl-I lights upthe lamps LMAN mounted in series. The relay RCH breaks the short-circuitof the terminals l and 2 of the cam wheel device CMO driven by the motorat a speed six times greater than the drum TCH. As the cam wheel has adouble contact, the impulses are sent at the normal rhythm (10 persecond) and in a number corresponding to the number fixed by the relaysPR. The cam wheel CMO could be replaced by a 12-contact cam mounted onthe axle of the drum TCH, rotating at 10/12 revolutions per second, inwhich case the rhythm of the impulses would also be 10 per second. Fromposition XIII and up to position XVIII (see DG the listening circuit isconnected with the loudspeaker, the terminals of which are designated by12 and 13 (Figure 1), through the connection of the wires l1 and [8. Ifthe line called is busy, the subscriber hears on the loudspeaker thebusy signal; he keeps the set functioning, which resumes the sameoperation as described until the line is free, beginning in opening theline circuit (position Y of D6 see here above) what removes the busytone, before sending anew the impulses. If the line is free, thesubscriber hears the calling signal or the answer of the other party; hethen presses on a stop push-button MAA (Figure 1) in order to releasethe transit relay RTR by cutting the wire H the control lamp LMAA isthen extinguished. This releasing of relay RTR causes the motor to stop,as the wire I9 is no longer fed; the rotary contact CTO becomesimmobilized; (furthermore, the wire 22 which feeds the rotary contact isno longer fed). On the other hand, the wire 23 receives current whichthrough the arm DG actuates the relay RDG, which causes the generaldistributor DG to advance until it is in position Z, that is to sayuntil it has returned to zero. The handling of the push-button MAA maybe replaced by the action of an occupation relay ROC (Figure l) whichoperates as a charge relay as soon as the other party unhooks thereceiver and which interrupts the wire II. This interruption couldlikewise be effected by a relay reacting upon the impulses of acall-controldetecting current. The push-button MAA also makes itpossible to cancel a wrong call-sign during the composition thereof bycutting the wires 21] and 2|. The conversation takes place through theloudspeaker, the terminals I2 and 133 being those of the pick-up of theamplifier, and by microphone or else by loud-speaker operating as amicrophone. microtelephone, suspended on the cradle F, so that theloudspeaker be disconnected, the wires l1 and I8 being then disconnected(Figure 1). As described above, the connecting of the switch MTKproduces the switching-on of the amplifier AH through the connecting ofthe wires 8 and 9. However, if the lamps of the amplifier AH are notlukewarm-heated lamps, then the loudspeaker will not be instantaneouslyaudible. This is why a switch MACH equipped with a control lamp LMACH(Figure 1) makes it possible for the sub-' scriber to connect theamplifier in a permanent manner.

When the subscriber himself is being called, he presses the button MTK,thus connecting the relay RTK, which results in closing the linecircuit. The motor does not start because the transit relay RTR is notconnected. If the subscriber does not want to hear the ringing of hisset and if he wishes to avoid the manipulation customarily necessary foranswering, he may make use of an automatic answer device. For this, heconnects a switch MAR (Figure 1) equipped with a control lamp LMAR,which then lights. When a call comes from the outside, which alwaysresults in energizing a connecting relay RDE (Figure 1), the wire 26 isfed and 9,

However, it suifices to unhook a scriber can thus speak without havingmad rg;

single gesture. At the 'end' of-the conversation, it is necessary torelease the switch-MAR, which releases the relays RSA and R'I K. Thefsub-= scriber may immediately re conneotithe MAR for the automaticr'eceiv-ing of subsequent calls.

The above described deviceffor the recording of a call-sign is .anelectricdevice wh includes mainly the groups 01 relays RR and he switchORR. It could :likex'vise be mechanical of elec tro mechani'c'al likethe device shown Figure 4. A rotary recording cylinder with oscillatorycams' CA piyotally its periphery. These "cams are distributed in I8groups of 110 "(1, I12, III, etc.) each group extend ingalong adire'ctrix of'the cylinder' and -all-these groups together occupying theenmeeynnancai surface. The cams have a rest 'positionand anoperatingposition. only two cams,eachoccupying one of 'these twopositions, areshown in Figure 4. The cams CA are actuated by means ofrelays RCA, T in: number (-two of which are shown) ,namelyone p'er oamef-each group, and the relaysin turn are controlled byfthe lo-co'n tactsM-All of Figure 2. As abovefthesecontacts are actuated by a d'evicefor-tne composin'g'df the call-sign, which device consists of a keyboardcontaining .as maniy keys as there are MAN con tacts. The device couldailsoinc'lude an ordinary disc, manually operated and integral with acam wheel.

The cylinder TE-is ma'de dependent-on a relay STE,diagrammaticallyshown, playing the part of the switch CRR, which hasbeen eliminated. The relay STE operates when the subscriber composes acall-sign and causes "thecylinder to turn to the extent of /is of a turnafter each operation of aMANkey, so asto place each-group of cams CAsuccessively opposite thereIays -RCA'. Thus for acall-sign consisting of"one fnum'ber, each digit'of-the-riumbel will bereco'r'ded'in a" diffe'rent group of cams, eachgroupdncluding as many cams CA as there arepossible-di'gitsjnarnei 1y 10. This arrang e'ment co'lild'easilybe-extended to call-signs consisting of letters or even of figures andletters. The number 'ofgroups will be determined'bythe lehg'th-andibythe number of signs which the set should be able' 'to recordsimultaneously. Inorder to compose the number 27-1, for example, 'thesubscriber first of 'allpres'ses on the key MAN Of the keyboard, whichcloses the corresponding MAN contact. 7 The group 'I of cams GA beingopposite the relays RCA, the cam CAI Will be brought-to theose'rating=pos iti'on'. The subscriber presses on the key M A-N therelay STE causes the-cylinder TE'to turn to the extent of /18 of-aturnso as "to-bringthe group II of cams CA opposite the" rel'ays'RCA and thecam CAII" is shifted. The subscriber presses on the key MAN the relaybrings thev group IIIof 'camsCAopposite the-relays RCA, and the cam'CAIII' -i's shifted. The-'hufnber 271' is' then recorded.

The relays Rosana STECOuld be replaeeii by mechanical transmissionmembers. Thus" the drum could be continuously incited to i'otate by themotor M0, through a friction coupling. An esca ement wheel mounted onthe shaft of the drum and 'an anchor controlled by the keyboard MANwould makeit possibletoieffect the stepwise' advance of'the drum.

In theca-seof the recordingcy linder; the autc'" matic means to throwrepea'tedly over the telephone'line impulses which correspond to therecorded call-sign are identical with those of the previously describedexample. The relays 'PR :being eliminated, the number ICI-I is' fedthrough 10 contacts CTE which can'beclosedby the cams CA placed inoperating position. These contacts CTE serve furthermore the purpose oflighting the lamps LMAN. The general distrib uto'rDG acts as previouslyinconnection with the motor MO. It causes the intermittent rotation ofthe cylinder TE so that the various groups "of cams successively actuate'thecontacts GTE.

suitable device (not shown) is provided for returning the cylinder TE toits initial position at the time of the call proper, that is to s'ay,atthe described by way of example includes 12 groupsof relays PR whichmake it possible to record at the same time two call-signs of 6 digitseach. The electro-mechanic'al "device described above includes 18 groupsof cams 'CA making, it possible" torecord two signals of 9 digits each.Obviously like devices could easily be conceived for making it possibleto record more than "2 call-signs, and longer call-signs. The devicewhich wilPbedescribed below and which mainly includes a stepwise finderwith four arms DD, namely DD D13 DD (Figure 1), and DD (Figure 3) makesuse of this possibility to record two call-signs for em abling to callsuccessivelytwo parties whose-'call signs have been composed oneimmediately after the other.

The subscriber composesthe first call-sign on the keys MAN, then he oprates switch 'MAD (Figure 1) and composes the second call-sign. Theclosing of switch MAD produces at first the advance of the switch CRR'upto the contact'VI,

irrespective of the contact (from 'I to VI), on

which the composition of the first call -sign was completed, so that thecomposition of the--=scc-' which causes the'swi'tch CRR to advance. The

latter, once it'has reached the :contact VI, feeds thewire 5 l-5'lthereby energizing a relay RDU (Figure 2) which is subsequently held'bythe wire 6'!" and which will be released when the finder DD has left thecontact 0, that is to say, when the composition of the second call-signhas start ed. The connecting-of RDU produces the discon necting of thewires 6910'; the relay RR is no longer fed and the switch ORR stops onthe con tact VI. The composition of thesecond call-sign starts thereforeon contact VII ofswitchCRR and,

is effected in a manner identical to that of the first call sign. Theconnecting of MAD furthermore results in lighting two control lampsdesig, nated byDU' and PI ,"respectively, in breaking'tneshort-circuitofthewires 33 andlaland in send irig current through thewires l'l"|"l to the general distributor DG The two control lamps may,for example, bear the letters DU and PLEX forming the word DUPLEX, whichsuggests the idea of the double call. The wires 33 and 34 lead,respectively, from the distributors DG and DG to the stepwise finder DDall the odd contacts of which are connected by the wire 33 with'DG- andall the even contacts of which are connected by the wire 34 with DG Thefinder DD serves, as will be seen, for holding one of the numbers whilethe communication takes place with the other. Its odd contacts areconnected by wire 21 with the relays PR, which are dependent on thedistributor arm DG and its even contacts are connected by a wire withthe relays PR, which are dependent on the distributor arm DG If at themoment the call is thrown on the line, DD is on an even contact, or moregenerally, on 0, the impulses of the first call-sign are transmittedover the telephone line by th distributor DG. If the line of the partycalled is busy, the general distributor DG continues its travel. At theposition Y of the distributor arm DG current is sent by the wire 28 to arelay RDD, controls the advance of the finder DD. The finder DD thenadvances onto the next contact, an odd contact, and it is thedistributor DG which sends the impulses of the second number over thetelephone line. During this time, the lamps DU and PL light upalternatingly according to whether the first or second number istransmitted over the line and the signals (call, busy, etc.) aretransmitted by the loudspeaker. As soon as a line is free, thesubscriber presses the stop push-but; ton MAA and the conversation takesplace. As was seen above, the operating of the push button MAA producesthe return of the distributor DG to 0, and the disconnecting of therelays PR. However, some of the PR relays, namely precisely thosecomposing the number not yet obtained, are held by the maintainingcurrent coming from DB over the lines 20 or 2 i.

When the first conversation is over, the subscriber releases the switchMAD so that the lamps DU and PL are no longer fed, nor is thedistributor DG the lines 33 and 34 are shortcircuited, and current issent through the wires 42 and then M to the arm DD which feeds the relayRDD. The latter causes the finder DD to advance up to zero .position.While returning to zero, the arm DD (Figure 3) passes over the contact,XXV, thus sending current through the wire 5 and through the wire 4, therelay RTK being still connected, which results in again connecting thetransit relay RTR. This connecting produces, as was seen above, thestarting of the motor MO. The searching for the second number,maintained by DD during the first communication, starts. The relays PRare of the slow releasing type, so that they do not become disconnectedbetween the moment when DD starts its return to 0 and the moment whenthe arm DD passes over contact XXV. From that time on, RTR beingenergized, the wires 2?] and 2i are again fed and hold the relays PR.

The set may also be provided with a device, which makes it possible forthe subscriber to prepare and retain one or more fixed numbers which hefrequently uses and which he may subsequently throw over the line bysimply manipulating a single switch. This device mainly includes aseries of switches COF represented in Figure 3. There may be as manyseries of switches as there are fixed numbers desired to be used in theset.

The example represented includes a single series of switches for asingle fixed number. This series includes nine switches COF so as to beable to prepare a nine-digit number. Each switch has as many positionsas there are digits possible, namely ten, and may be operated manuallyby the subscriber. Each position is a double contact position, onecontact serving for the lighting of the lamps LMAN. Nine drums withfigures (now shown) indicate what number is being prepared. Thesubscriber who wishes to call a prepared number presses on a button MAFequipped with a control lamp LMF which then lights up, as current issent through the wire 36 to the arm DF of the distributor DG which is inits Z position. The advance of the distributor- DG is again controlled bthe relay RDG. The operation of the button MAF likewise produces,through the wires 25'--25, the connecting of the relay RTK, the feedingthrough wire 22' of the rotary contact CTO and the starting of the motorMO through the wires 3598. The motor is then in operation as long as apressure is exercised on the button MAP and the rotary contact CTOactuates the relay RDG, which controls the operation of the distributorDF When the distributor DF has advanced one step, namely after the firstturn of the contact CTO, it has reached position Y, the lamp LMF isextinguished and the transit relay RTR (Figure 1) is connected throughthe wires 4'-4. The motor MO is then fed by the wires l99-8, so that thebutton MAF can be released. The button MAF is a single action button forthe contacts designated by 75, that is to say, it is necessary tocontinue pressing the button to keep these contacts closed, and it is adouble acting button for the contacts designated by 16, that is to say,these contacts remain closed after the button is released and a newpressure on this button is necessary to release them. The operation ofthe button MAF lasts only a brief moment. The distributor DF thenoperates in a manner similar to that of the distributors DG or DG Thewires of the series of switches COF are connected with the terminals Nto N of the numbering drum TCH. When the call has been put through, thesubscriber presses the button MAA, in order to release the transit relayRTR and to stop the motor as was described previously. At the end of thecommunication, the subscriber releases the button MAF, namely, thecontacts 16 which alone have remained connected. There are as manybuttons MAF, arms DF and series of switches COF as there are fixednumbers to be prepared in the set.

When the subscriber must, during a conversation, take note of a number,he may, instead of writing it and subsequently composing it, compose itimmediately on the keyboard by means of a motor blocking device, whichdevice includes a blocking relay RBL (Figure l) and operates as follows:

During the ordinary manipulation of the MAN keys, the transit relay RTRis energized, but the relay RTK is kept disconnected. Upon energizingthe RTR relay actuates an impulse contact 14, connecting the wire 56with the wire 46 (the wire 66 is fed by the wire 61, the finder DDremaining at zero). The contact 14 being an impulse contact, the wire 46is fed for only one instant, which results in energizing the blockingrelay RBL which is ordinarily immediately resleased again. In case ofsimultaneous recording, however, the 'MA-Nkeys are manipulated at a timewhen a communication takes place; that is to say, at a time when relayRTK'is already connected. The r-eIayRBL, connected the'moment contact"It isactuated, then is held by means of the cur- "rentsentto it throughthe wires 49-40-42, the

contact between wires 49' and'30 being closed by relay 'RTK; The 'relay-REL-remaining connected, cuts the wire l9 and-thereby prevents the motorMO from starting; on the other hand, the con- "meeting of the relay RBLcauses the feeding of the wire 19, whereby the cancelling relay RA isheld in spite of'the energizing of relayR'I-K. At

the end of the conversation, the subscriber releases the'switchMTKy-thus releasing the relay "RTK, which cuts the communication betweenthe wires 49 and 30 and releases the blocking re- 'lay--RBL. The motordoes-not yet start because,

"the relay RTK being released", the Wires 8 and 9' are notconnected It'suflices for the subscriber to-again press onthebutton MTK in order toreenergize the relay RTK' and thereby tostart again the motor in orderto transmit over theline the number, which was composed during the firstcommunication.

It will'be advisableto equip the set witha device, in particulara'switch, making it possible for the subscriberto checkup on theduration of his communication by means of a clockwork with luminousdial, in particular; in the case of long distance communications.Furthermore, the set maybe provided with a'recordingdevic'eintendedto'register, on paper-tape, for example, indications whichmakeitpossible to control some of the functions of the-apparatus; Thus thecallsigns may be entered at the time of their composition; specialannotations indicating'the exact sign impulses over the telephone linecorresponding to-a call-sign recorded, means-for opening'th'e telephoneline before each sending of said impulses, means forsetting saidautomatic means in operation 'ai-ter'a call-sign-has been recorded,means whereby a selecte'd' line-is connected, means for releasing: saidautomatic means responsive to the connection of said selected line, andindicating means for enabling the subscriber to be signalled that thecallhas-been established; said indicating tmeans dispensing with thenecessity of the-receiver beingilheld .again'st'fthe="huinan ear.

12;: Atelephonesetfaccordingaclaim 1, in'which said indicating: meanscomprises a loudspeaker connectable: in the telephone 'linemaki'ng itpossible to hear:- the operation: of said automatic means and moreover.to listen: to the part called'.

3, In, a-- telephone set connected to a telephone line; the; combinationof a; pluraiity' of? switch meansdior nanuallymomposingacall;-

means fnrirecordingrsaickcall sigmac mprising'fanumber involved for eachelement of said call-sign and held until the call is put through;contact means associated with each relay and actuated upon energizingthereof; automatic distributor means for feeding current to said contactmeans of said several relay groups successively and repeatedly; meansfor transmitting impulses overthe telephone line; control means coupledto said relay contact means for controlling said impulse transmittingmeans depending on which of saidrelay contact means has been'actuated;means for-setting saidautomatic distributor means in operation after acall-sign has been recorded; means wherebyaselected line is connected tothe calling line and means for releasing said automatic: distributormeans when the selected line is free and the callhas been put through.

4 A telephone set according toclaim 3 in which "said switch means formanually composing a call-sign comprises a keyboard with a like numberof keys as there are recording relays in a relay group, said keys uponmanipulation temporarily'closing a circuit for energizing the recordingrelays involved. 7

5. In a telephone set, the combination or a plurality of switch meansfor manually composing'a call-sign; means forrecor'ding at least onecall-sign, comprising a number of groups of recording relays, the numberof said groups being at least equal to the number of elements in acall-sign andthere being as man recording relays in one group asthereare switch means; a distributor having a contact arm movable stepwiseover a like number of contacts as there are relay groups, the relays ofa group beingv connected on the one hand to a same contact of saiddistributor and on the other hand to the respective contacts of saidhand switch means; a current supply-source in circuit with saiddistributor arm and said hand switch means; relay means. for stepwiseadvancing said distributor'arm and actuat'ed on. each manipulation ofsaid hand switch means; a holding relay actuated upon energizing of saidrelay-means and serving to close a circuit for holding said recordingrelays after energizing thereof; second relay means for returning saiddistributor arm to zero position and operating upon releasing of saidholding relay; contacts associated with said recording'relays and closedupon energizing thereof automatic second distrib. utor means having atleast one contact arm mov able-stepwise over a series of contacts; arotatable contact drum having a like number of interconnectedsegmental'contact mean cooperating with fixed" contacts as there arerecording relays in a group, each segmental contact'having a distinctlength; the said recording'relay contactsoi a recordingrelay group beingconnected on the one hand to a same contact of said automatic seconddistributor and on the other hand to'the respective fixed contacts ofsaid contact drum; a third relay means connected in circuit with saidsegmental contact means, with said second distributor arm and with a"current supply source; means fortransmittingcall-sign impulses overthe. telephone, line, controll'edibysaid'third relay means;

- means'fonsetting-'saidautomatic second distributorand said contactdrum in operation after a call-sign has been recorded; and means forreleasing said second distributor and said contact drum when theselected line is free and the call has been put through.

6. In a telephone set, the combination of means for manuall composing acall-sign; means for recording said call-sign, comprising a rotarycylinder provided with a plurality of groups of cams,

the cams of each group being pivotally mounted along a generatrix of thecylinder, each of these cams capable of occupying a rest position and anoperating position; means actuated b said com- .posing means and placedopposite a generatrix of said cylinder, for moving one cam of a group ata time from said rest position to said operating position; means forrotating said cylinder upon each operation of said composing means oversuch an angle as to put the next group of cams opposite said camactuating means; contact pairs of a number equal to the number of camsin a group and placed in a line opposite a generatrix of said cylinder,one opposite each cam of a group, in 1 such a way that a contact pair isactuated by a corresponding cam, when said cam is in its operatingposition and the group of cams it belongs to is rotated to a positionopposite said line of contact pairs; means for returning said cylinderto a zero position after composition of a call-sign; automatic means forstepwise rotaing said cylinder so as to place each group of camsopposite said line of contact pairs successively and repeatedly; meansfor transmitting call-sign impulses over the telephone line; controlmeans actuated upon the closing of said contact pairs,

for controlling said impulse transmitting means in correspondence withwhich of said contact pairs of a group is closed; means for setting saidautomatic cylinder rotating means in operation after a call-sign hasbeen recorded; and means for releasing said automatic cylinder rotatingmeans when the selected line is free and the call has been put through.

7. A telephone set according to claim 6, in

which said manually composin means comprises positions, means forcomposing and fixedly recording at least one call-sign; an automaticdistributor having at least one contact arm movable stepwise over aseries of contacts including means for putting said switchessuccessively and repeatedly in circuit, each of said switches beingconnected to one of said distributor contacts;

means for transmitting call-sign impulses over the telephone line;control means coupled to the several contacts of said switches forcontrolling said impulse transmitting means depending on which of saidswitch contacts is closed; means for setting said distributor inoperation; means for connecting the selected line to the calling lineand means for releasing said distributor when the selected line is freeand the call has been put through. a

9. In a telephone set, the combination of means for manually composing acall-sign; means for recording a call-sign, means for actuating andreleasing said recording means, said recording means being actuated uponmanipulation of said composing means and released after a call has beenput through; automatic means for succes (12 sively and repeatedlyfeeding current to said recording means; at least one series of manuallyoperable switches, means whereby each is capable of occupying severalpositions, for composing and fixedly recording at least one call-sign;an automatic distributor having a contact arm movable stepwise'over aseries of contacts including means for putting said switchessuccessively and repeatedly in circuit, each of said switches beingconnected to one of said distributor contacts; switch means forconnecting said automatic means or said distributor; means for settingsaid automatic means and said distributor in operation, means wherebythe selected line is connected to the calling line and means forreleasing said automatic means and said distributor when the selectedline i free and the call has been put through. i

10. In a telephone set, the combination of means for manually composinga call-sign; means for recording at least one call-sign, comprising ,anumber of groups of contacts, actuated upon manipulation ofsaid-composing means in accordance with the call-sign composed;automatic means for feeding current to said series of contactssuccessively and repeatedly; a rotatable contact drum provided with anumber of segmental contact means of different length cooperating withfixed contacts connected to the respective contacts of eachgroup ofrecording contacts; relay means connected to said segmental contactmeans; a rotatable cam wheel cooperating with a contact pair placedinthe telephone line, so as to open and close said contact pair at leastonce on each rotation; a second contact pair connected in parallel withsaid first contact pair and actuated upon energizing of said relay meansto be opened only during the several distinct time periods the circuitof said relay means is closed by one of said segmental contact means,thereby regulating the number of impulses transmitted over the telephoneline by the successive opening and closing of said cam wheel actuatedcontact pair dependin on which one of said segmental contact means iscurrent fed through the closing of one of said recording contacts; meansfor putting said automatic feeding means, said contact drum and said camwheel in operation after a call-sign has been recorded; and means forreleasing said automatic feeding means, contact drum and cam wheel whenthe selected line is free and the call has been put through. i

1 11. In a telephone set connected to a telephone line, the combinationof a plurality of switch means for manually composing a call-sign; meansfor recording at least one call-sign, comprising a number of groups ofcontact pairs actuated upon manipulation of said composing means in sucha way that one contact pair in each contact group involved is actuatedfor each composin element of said call-sign; means for transmittingcall-sign impulses over the tele; phone line; control means connected tosaid recording contact'pairs'for controlling said impulse transmittingmeans depending on which of said contact pairs has been actuated by saidcomposing means; an automatic distributor hav ing several contact armsmovable stepwise over a number of contacts, said groups of recordingcontact pairs being connected each to a contact of said distributor,thereby to be successively and repeatedly current fed by saiddistributor arms; relay means for advancing said distributor arms; arotary contact in series with said relay means: :for; intermittentlenergi 'ing said relay :me ns; a, motor driving said rotary contact; a

hand switch for puttin the call through after the. recording of} acall-sign; a second'r lay energized bythe closing of, said hand switchthereby closing a, switch in the telephone line and; clo ingaswitchinthe circuit of said motor; means whereby the selected line isconnected to the calling-dine and, switch means: for interruptingisaid;motor circuit when the, selected line is free and the call has been putthrough. 1,2. In a telephone set, the combination of a plurality ofswitch means for manually co posing-call-signs: means for recording atleast one callign, comprising" a number ofgrouns of recording relayscontrolled by said switch means,

each r cordin relay; acting on a contact pair,

such a way t at one 'recordingrelay is energized and thereby onecontact'pair closed in each groupinvolved foreach: composing element ofa call-sign; a holding relay ener hed and held upon operation ofsaidcomposing-switch means, thereby closing a circuit, for holding saidenergized recording relays; means for transmitting call-sign impulsesover the telephone line; control means connected to said recordingcontact pairs for controlling said impulse transm tting means depending'on which of said recording relays hasbeen actuated: an automaticdistributor having several contact arms movable stepwise over a numberof contacts, saidfgroups of record ng relay contact pairs beingconnected each: to, a contact of said distributor so as tobeg-successively and repeatedly put in circuit with a current supplysource and. with said control means by at least one of said distributorarms; relay meansfor advancing-said distributor arms;

arotarycontact in series-with said relay means for intermittentlyenergizing said re ay means; fizl'IlQtO! for dri ing saidro ary contact:a hand switch for effect ng the call after recording of a call-sign; a.second relay being energized on the closing of said hand, switch,thereby closin a switch in the tele hone lineand a switch in the.

circuit of said motor; a further relay switch in said motor circuitactuated by said holding relay; a third. relay operatin on a secondswitch in the telephone line; a contact on said distributor actuatedprior to said distributor contacts, which are connected to saidrecording relay contacts, for closing a circuit comprising said thirdrelay to open the telephone line temporarily prior to the transmi sionof the call-sign impuls s; means for rel asing said holding relay, to beactuated after the call has been put through, thereby cutting said motorcirc it and said recording relay holding circuits; and further contactmeans on said distributor for closing a circuit feeding current to saiddistributor arm advancing relay means after the releasing of saidholding relay, to advance said distributor arms to zero position.

13. A telephone set according to claim 12, in which the means forreleasing the holding relay after the call has been put throu hcomprises an automatic device connected to the telephone line andreacting to impulses of a charge meter current. i

14. A telephone set according toclaim 12, in which the means for releasng the holding relay after the call has been put through comprises anautomatic device coupled to the telephone line and reacting to theimpulses of a call-detecting current.

15. A telephone set according to claim 12, in which the means forreleasing the holding relay aLDIEh'rbUHlQII andv a; control lamplighting upon the energizing of? said holding relay and extin:guislned-v upon releasing,- of said holding relay. by the manipulationof said push-button.

16. A: telephone-set according toclaim l2with means permitting-therecordingof a cal1;sign dur-. ingcommunication over-the telephone line,said meanscomprising a: blockingrelay, an impulse contact'actuated bysaid holdingrelay and placed .n:serieswith; said blocking relay tobriefly energize: said blocking relay upon operation of said holdingrelay, a circuit for holdin said blocking relay after energizingthereof, saidcircuit comprising a, holding contact closed upon theclosofi said handswitch for effecting a call and ath rdswitch ingsaidmotor circuit-actuated bysaid blocking-re ay so as tobEgOPEI'lGd uponenera gizing, of the relay:

15 In a, telephone set, the combination of a, plurality of switch meansfor manually compose inga callsign; means for recording several callsigns at the same time, said means comprising a plurality of groups ofcontact pairs, said plurali-ty of groupsbeing divided in: several parts,each mart-comprising a number of group at least, equal! to the number ofelements in a, call-sign, andsaid recording contactpairs being-act atedby said-composingmeans in such: a waythat one contact pair in eachcontactgroup involved is; closedrfor each composing elementof'acall-sign; means for transmitting call-sign; impulses over; thetelephone line; control means; connected to said contact pairsforcontrolling said impulse 5 transmitting means dependin on which orsaiddistributor, conn cting alternately each of said distributor arms incircuit so as to feed current alternately to each number of saidrecording contact groups after each rotation of said distributor; meanswhereby the selected line is connected to the calling line, means forrelea ing said distributor after a call has been been put through; meansfor holdin the contact pairs recording the other composing call-si nswhile said communication takes place, and mean for again setting inoperation said distributor advancing means, when said commun cation isfinished, to put through the respective other calls.

18. In a telephone set, the combination of a pluralitv of switch meansfor manually composing a call-sign, me ns for recording at least two calsigns at the same time, said means comprising for each call-sign aseries of groups of recording relays controlled by said switch means,each recording relay acting on a contact pair, all in such a way thatone recording relay is energized and 7 thereby one contact pair closedin each involved of saidrecording relays have been actuated; anautomatic distributor having at least two rotatable contact arms eachmoving stepwise over a series of contacts, the respective recordingcontact groups of each of said two series of groups being connected toone of the respective contacts of said series of distributor contacts,said groups thereby being successively and repeatedly connected to oneof said two distributor arms upon rotation thereof; finder meanscomprising a rotary contact arm moving stepwise over a number ofcontacts, which are alternately connected to the one or the other ofsaid two distributor arms, said finder contact arm thereby closing acircuit feeding current to one or the other of said series of recordingrelay contact groups for putting through one or the other of the twocall-signs recorded; means actuated by a contact of said distributor oneach rotation thereof following its zero position for advancing saidfinder contact arm one step; means actuated by a further contact of saiddistributor following its zero position for temporarily opening thetelephone line; means for interrupting the action of said distributorwhen a free line has been selected; second finder means having a contactarm coupled to the first finder contact arm and moving stepwise over anumber of contacts thereby alternately closing said holding circuits ofsaid recording relays in such a way that when a call is being putthrough by means of one of said series of recording relay groups, therelays involved of said other series of recording relay groups are held;means for returning said finder contact arms to zero position after thefirst communication has taken place; and means actuated by the closingof a contact on said finder means as its arms return to zero position,for putting said distributor means again in operation in order to putthrough the second call.

19. A telephone set according to claim 18, comprising two control lampscontrolled by said finder means and lighting up alternately according towhich of said two recorded call-signs is being transmitted.

20. A telephone set according to claim 18, comprising a hand switch forconnecting said finder means to said distributor after the firstcall-sign has been recorded and for disconnecting said finder meansafter the first call has been put through.

21. A telephone set according to claim 5, in which said switch means formanually composing a callsign comprises a keyboard with a like number ofkeys as there are recording relays in a relay group, each key beingprovided with a verifying lamp, these verifying lamps being connectedacross said automatic second distributor means and said segmentalcontact means, whereby the verifying lamps corresponding to the keyswhich have been pressed at the time of composing the call-sign light upsuccessively and repeatedly during the transmission of impulses.

22. A telephone set according to claim 6, in which said manuallycomposing means comprises a keyboard, the keys of which are eachprovided with a verifying lamp, these verifying lamps being connectedacross said contact pairs and said control means, whereby the verifyinglamps corresponding to the keys which have been pressed at the time ofcomposing the call-sign light up successively and repeatedly during thetransmission of impulses.

PIERRE KAELIN.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,332,961 Tanner Mar. 9, 19201,709,031 McCoy Apr. 16, 1929 1,960,129 Tchoubritch May 22, 19341,972,289 Chauvean Sept. 4, 1934 2,085,884 Wilkinson July 6, 19372,165,063 MacKay July 4, 1939 2,314,801 Roberts Mar. 23, 1943 2,323,019Dohle June 29, 1943 2,333,195 Ponliart Nov. 2, 1943 2,402,341 PattersonJune 18, 1946 FOREIGN PATENTS Number Country Date 733,549 France Oct. 7,1932

